The round will be rated for the participants with rating lower than 2100. The statements will be available in Russian and English.

The round will start 2 hours after the start of the Qualification Stage, so they will finish around same time. That's why we ask the participants of the Quals to stay silent and don't share the statements of the contest with anyone. Unfortunately, we cannot add all the problems from Quals to the round, it will contain only six problems.

We also would like to express our gratitude to Mike MikeMirzayanov Mirzayanov for the permission to make a mirror and Codeforces and Polygon platforms, Ildar 300iq Gainullin for his help with testing the problems and preparing the round. Also big thanks to the testers: Adilbek adedalic Dalabaev and Roman Roms Glazov.

As usual, the scoring distribution will be announced just before the round.

The format of the competition is very similar to ACM-ICPC — teams consisting of up to three people are allowed, and they have one computer and five hours to solve problems without partial scoring. Ties are broken using the usual time penalty rules.

Just like last year, the onsite competition is divided in two "divisions", called Premier League and Rising Stars. The two contests will have most of their problems in common, but the Rising Stars competition will feature some easier tasks targeted at high school contestants. We do not guarantee that every problems unique to Div2 is easier than every problem that is not.

Both of the contests will be mirrored here on Codeforces, with Premier League mapping to the Div1 contest and Rising Stars mapping to the Div2 contest. The mirror will use native Codeforces ACM-ICPC team contest rules.

Both contests will be unrated, due to the format and the length of the mirror being dissimilar to the standard Codeforces rated rounds. Note that this is a team contest, i.e. competing in teams up to three people is allowed. (Of course, you can also compete in a 1-person team.) There will be at least 8 problems in each division.

As of now, Codeforces does not support rating-based divisions in team contests, so we came with the following ad-hoc rule: teams with the maximum rated member having rating less than 1900 should enter the Div2 contest. Teams with the maximum rated member having rating at least 2100 should definitely enter the Div1 contest. The teams not covered by the previous two criteria are free to choose.

As an extra, this is an elimination round for those who live in/near SPb/Novosibirsk. More info about the championship is in the other blog. Thanks to Dasha.AI for making such an event for the community!

We are pleased to announce the start of registration for Dasha Code Championship! We are Dasha.AI — a conversational AI startup with the huge ambition to use voice AI to pass the Full Turing Test. In a very short time, we managed to assemble a strong team of top specialists — among us there are 4 winners of international mathematics competitions, 16 ICPC participants, and several PhDs and Doctors of Science. Scientific research in the field of AI is led by Alexander Dyakonov — Doctor of Physical and Mathematical Sciences, Professor of Moscow State University, Professor Emeritus of the Russian Academy of Sciences, former Kaggle #1.

Recently we’ve been featured on TechCrunch. Every day we work to bring the future closer.

Examples of calls

Our team has grown and exists in a big part thanks to ICPC, and now we want to start paying tribute to the community by holding regular prize championships.

Dasha Code Championship

Dasha Code Championship will be held in two stages — Elimination and Final. The Final will be held simultaneously in two locations — St. Petersburg and Novosibirsk, Russia. According to the results of the Elimination round, lists of finalists in St. Petersburg and Novosibirsk will be formed. Top competitors will be invited to the finals according to the results of the Elimination round and based on their location and ability to travel. The winners of the onsite final (separately to each city) will be awarded the following prizes:

Round 1 (Elimination Internet Round)

The open Elimination Internet Round starts on September 14, 2019 at 16:05 (MSK). The round will be rated, open to all members of the Codeforces community. Top 30 competitors will receive official Dasha t-shirts!

Round 2 (Onsite Final Round)

The Onsite Final Round starts on September 22, 2019 at 12:05 (MSK). The finals will take place at the same time in St. Petersburg (at ITMO) and Novosibirsk (at the Dasha office). The top 50 participants in the Elimination round will be invited to St. Petersburg and Novosibirsk (travel expenses are not covered). The results will be made separate for each of the cities and prizes awarded accordingly. For online participants an open rating round will take place.

About company

We first got the idea in 2016. In 2018, a team of ICPC finalists and semi-finalists was formed and in early 2019, Dasha raised $2M from the RTP Ventures and RTP Global funds (early investors in Yandex). We already have over 18 big clients in the Russian Federation and pilot projects in the USA with Fortune 1000 companies. At the moment, Dasha has made over 4,000,000 phone calls on a number of use cases. Our goal is to create a universal platform for voice AI, which will pass the full Turing test with voice. To do this, we need the best minds on the planet and in our team you will have a chance to fully realize your engineering and scientific potential. You can contribute to the creation of something that will define tomorrow’s world.

You can join our team by filling out the form here (for Russian-speaking participants).

First and foremost, we would like to say a massive thank you to everyone who entered and submitted their answers to the first Kotlin Heroes competition which was held back in May. Congratulations to the top 3 winners Petr, ecnerwala, and abacabadabacaba on their incredible achievement, especially considering they were up against 4,500 other registrants from over 63 countries. We’d also like to give a shout out to tourist for being the only other person, outside of the top 3, to manage to solve every problem set from this round. Well done all of you!

Ready to challenge yourself to do better? The second "Kotlin Heroes" competition will be hosted on the Codeforces platform on the 7th of September, 2019, at 14:35 UTC (17:35 MSK, 07:35 PDT, 22:35 CST). The contest will last 2 hours 30 minutes and will feature a set of problems from simple ones, designed to be solvable by anyone, to hard ones, to make it interesting for seasoned competitive programmers. Top three winners will get prizes of $512, $256, and $128 respectively, top 50 will win a Kotlin Heroes t-shirt and an exclusive Kotlin badge, competitors solving at least one problem will enter into a draw for one of 50 Kotlin Heroes t-shirts.

The round will again be held in accordance with a set of slightly modified ICPC rules:

The round is unrated.

The contest will have 6-10 problems of various levels of complexity.

You are only allowed to use Kotlin to solve these problems.

Participants are ranked according to the number of correctly solved problems. Ties are resolved based on the lowest total penalty time for all problems, which is computed as follows. For each solved problem, a penalty is set to the submission time of that problem (the time since the start of the contest). An extra penalty of 10 minutes is added for each failed submission on solved problems (i.e., if you never solve the problem, you will not be penalized for trying that problem). If two participants solved the same number of problems and scored the same penalty, then those of them who had previously made the last successful submission will be given an advantage in the distribution of prizes and gifts.

Registration is already open and available via the link. It will be available until the end of the round.

If you are still new to Kotlin we have prepared a tutorial on competitive programming in Kotlin and a practice round, where you can try to solve a few simple problems in Kotlin. All the solutions are open, which means that you can look at the solution even if you haven't solved the problem yet. The practice round is available by the link.

This round will be rated for the participants with rating lower than 2100. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally.

Harbour.Space University and UTCC are collaborating to offer graduate students from anywhere in the world a once in a lifetime opportunity: fully funded scholarships for our Masters programs in Bangkok.

These scholarships are designed to completely eliminate the barrier between exceptional talents and sophisticated education: they cover the entire tuition fee as well as the cost of living expenses, and furthermore, they provide the student the valuable experience of both studying and working at Harbour.Space University.

We’re looking for the people who are going to change the world.

If you or someone you know are interested in technology, entrepreneurship, or design, and believe you have what it takes, we want to hear from you!

These days Moscow is conducting the 4th International Olympiad of Metropolises that is an international competition for high school students from biggest cities and capitals all around the world. One of the disciplines of the competition is informatics. Rounds of the competition were prepared by the jury members invited from St. Petersburg, Minsk, Belgrade and Moscow olympiad scientific committee which you may know by Moscow team Olympiad, Open Olympiad in Informatics and Moscow Olympiad for young students (rounds 327, 342, 345, 376, 401, 433, 441, 466, 469, 507, 516, 541, 545, 567).

Hello! Codeforces Round #582 (Div. 3) will start at Aug/30/2019 17:35 (Moscow time). You will be offered 6 or 7 problems (or 8) with expected difficulties to compose an interesting competition for participants with ratings up to 1600. However, all of you who wish to take part and have rating 1600 or higher, can register for the round unofficially.

The round will be hosted by rules of educational rounds (extended ACM-ICPC). Thus, during the round, solutions will be judged on preliminary tests, and after the round it will be a 12-hour phase of open hacks. I tried to make strong tests — just like you will be upset if many solutions fail after the contest is over.

You will be given 6 or 7 (or 8) problems and 2 hours to solve them.

Note that the penalty for the wrong submission in this round (and the following Div. 3 rounds) is 10 minutes.

Remember that only the trusted participants of the third division will be included in the official standings table. As it is written by link, this is a compulsory measure for combating unsporting behavior. To qualify as a trusted participants of the third division, you must:

take part in at least two rated rounds (and solve at least one problem in each of them),

do not have a point of 1900 or higher in the rating.

Regardless of whether you are a trusted participant of the third division or not, if your rating is less than 1600, then the round will be rated for you.

Thanks to MikeMirzayanov for the platform, help with ideas for problems and for coordination of my work. Thanks to my good friends Mikhail PikMike Piklyaev, Maksim Ne0n25 Mescheryakov and Ivan BledDest Androsov for help in round preparation and testing the round.

Good luck!

I also would like to say that participants who will submit wrong solutions on purpose and hack them afterwards (example) will not be shown in the hacking leaders table.

The Department of Computer Science and Engineering, IIT (BHU) is conducting Codefest from 23rd August — 25th August. Manthan, the algorithmic programming contest under the banner of Codefest, is being held as a special Codeforces round. The round follows regular Codeforces rules.